So originally it was 5$per ft now it is 120 dollars total at 12$ per ft, I hope this helps!
does that give you options or choices dowen there so I can answer your question
820=P(1.05)^3
P=708.35
I'm sorry I don't know how explain but that is the answer to the problem; 708.35
The fundamental theorem of algegra is often cited to say that an n-th degree polynomial has n roots. They may not always be distinct, and they may not always be real.
An n-th degree polynomial may have up to n distinct real roots.